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$375+ Cheap flights from Ontario (ONT) to Singapore

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SIN
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
1 adult, Economy
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Cheap flight deals from Ontario to Singapore

Keep the following information in mind while searching for Ontario to Singapore flight deals. Data was last updated agosto 14, 2025.

Round-trip from

$734
(Delta)

One-way from

$377
(Delta)

Popular in

December

Cheapest in

August

Average price

$764
From Ontario to Singapore
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One-way flight from Ontario to Singapore
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Highest demand for flights based on searches. 14% potential increase in price ($169 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($54 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Ontario to Singapore

Cheapest flights from Ontario to Singapore
Explore the most affordable flight options available from Ontario to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 14, 2025.

This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/156:00 amONT - SIN
2 stops26h 40mDelta
lun. 9/297:30 amSIN - ONT
2 stops31h 12mDelta
Deal found 8/14$734
This Korean Air deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/156:00 amONT - SIN
2 stops26h 40mKorean Air
mié. 10/17:30 amSIN - ONT
2 stops24h 30mKorean Air
Deal found 8/12$739
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/136:43 amONT - SIN
2 stops30h 17mDelta
mié. 11/1910:30 pmSIN - ONT
2 stops34h 47mDelta
Deal found 8/14$743
This Korean Air deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/156:00 amONT - SIN
2 stops32h 00mKorean Air
jue. 10/27:30 amSIN - ONT
2 stops24h 30mKorean Air
Deal found 8/12$748
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/145:40 pmONT - SIN
2 stops39h 00mDelta
mié. 10/11:10 amSIN - ONT
2 stops37h 32mDelta
Deal found 8/14$749
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/136:00 amONT - SIN
2 stops32h 00mDelta
mar. 10/77:30 amSIN - ONT
2 stops30h 11mDelta
Deal found 8/14$769
This Korean Air deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/196:00 amONT - SIN
2 stops32h 00mKorean Air
mar. 9/301:10 amSIN - ONT
2 stops36h 30mKorean Air
Deal found 8/12$774
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/306:50 pmONT - SIN
1 stop20h 25mUnited Airlines
mié. 9/38:45 amSIN - ONT
1 stop18h 28mUnited Airlines
Deal found 8/14$777
This Korean Air deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/196:00 amONT - SIN
2 stops32h 00mKorean Air
jue. 10/27:30 amSIN - ONT
2 stops24h 30mKorean Air
Deal found 8/12$783
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/186:00 amONT - SIN
1 stop21h 25mUnited Airlines
jue. 10/28:45 amSIN - ONT
1 stop18h 28mUnited Airlines
Deal found 8/14$784
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/155:10 amONT - SIN
2 stops34h 05mUnited Airlines
dom. 9/288:45 amSIN - ONT
1 stop18h 28mUnited Airlines
Deal found 8/14$788

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Singapore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 14, 2025.
Use the filters below to find and compare flights from Ontario to Singapore that are best for you.

Fly from

Ontario

Fly to

Singapore

Route

Depart

Return

Price

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

mié. 9/17

6:00 am-11:40 pm

2 stops26h 40m

Singapore Changi

mar. 9/30

1:10 am-10:40 pm

2 stops36h 30m

$734

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

mié. 9/10

6:05 am-11:40 pm

2 stops26h 35m

Singapore Changi

mar. 10/7

7:30 am-10:41 pm

2 stops30h 11m

$734

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

mié. 11/12

6:43 am-5:00 am

2 stops30h 17m

Singapore Changi

lun. 12/1

10:30 pm-5:17 pm

2 stops34h 47m

$734

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

lun. 9/15

6:00 am-11:40 pm

2 stops26h 40m

Singapore Changi

dom. 10/26

10:30 pm-10:41 pm

2 stops39h 11m

$734

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

mié. 9/10

6:00 am-5:00 am

2 stops32h 00m

Singapore Changi

jue. 10/30

11:00 am-10:41 pm

2 stops26h 41m

$734

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

mar. 9/16

6:00 am-11:40 pm

2 stops26h 40m

Singapore Changi

dom. 9/28

10:30 pm-11:42 pm

2 stops40h 12m

$734

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

lun. 9/15

6:00 am-11:40 pm

2 stops26h 40m

Singapore Changi

mié. 10/29

11:00 am-10:41 pm

2 stops26h 41m

$734

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

lun. 9/15

6:00 am-11:40 pm

2 stops26h 40m

Singapore Changi

mar. 10/28

11:00 am-9:20 pm

2 stops25h 20m

$734

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

mié. 9/10

6:00 am-5:00 am

2 stops32h 00m

Singapore Changi

mié. 9/17

7:30 am-10:40 pm

2 stops30h 10m

$734

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

jue. 11/13

6:43 am-12:10 am

2 stops25h 27m

Singapore Changi

lun. 12/22

11:00 am-10:42 pm

2 stops27h 42m

$734

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 23 results
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Best time to book a flight from Ontario to Singapore

Have a flexible travel schedule? Discover the best time to fly to Singapore from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Singapore

What is the cheapest month to book a flight from Ontario to Singapore?

Currently, October is the cheapest month in which you can book a flight from Ontario to Singapore (average of $991). Flying from Ontario to Singapore in December is currently the most expensive (average of $1,684). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to SG?

Find hourly flight availability from Ontario to Singapore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 14, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Singapore as you normally would.

Reviews of airlines servicing Singapore

Get insights into the airlines that provide service to Singapore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Singapore. Reviews last updated agosto 14, 2025.
See what other customers who have flown with STARLUX Airlines, China Airlines, and United Airlines from Ontario to Singapore have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.0
Wonderful
204 reviews

Crew

9.3

Boarding

9.0

Food

8.7

Overall

9.0

Entertainment

8.9

Comfort

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.0
Wonderful
204 reviews
STARLUX Airlines
9.0
Wonderful
204 reviews

Crew

9.3

Boarding

9.0

Food

8.7

Overall

9.0

Entertainment

8.9

Comfort

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
762 reviews
STARLUX Airlines
9.0
Wonderful
204 reviews

Crew

9.3

Boarding

9.0

Food

8.7

Overall

9.0

Entertainment

8.9

Comfort

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
United Airlines
7.4
Good
8,916 reviews
STARLUX Airlines
9.0
Wonderful
204 reviews

Crew

9.3

Boarding

9.0

Food

8.7

Overall

9.0

Entertainment

8.9

Comfort

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Singapore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Singapore?

    If you book a flight to Singapore from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • Can I find deals for flights from Ontario to Singapore that include hotel bookings?

    Yes. In addition to deals on Ontario to Singapore flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Singapore?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Singapore.

  • Can I find deals for business class flights from Ontario to Singapore?

    Yes. Cheapflights offers flight deals from Ontario to Singapore by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Singapore?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Singapore (average of $991). Flying from Ontario to Singapore in December is currently the most expensive (average of $1,684). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Ontario to Singapore

Discover the top 3 airlines that operate flights from Ontario to Singapore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$887Average$1,039FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$964Average$1,125FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$1,351Average$1,438FlexibilityNo cancel feeOn-timeN/A

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